Page History

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Metric name

Diagnostic plots

Objectives

1

Production History Map

Background = STOIIP & Structure

Bubbles = q_o, q_g , q_w, q_inj

,

Number = VRR, P_e

over STOIIP & Structure

Production Distribution Overview

LaTeX Math Block

anchor	1
alignment	left

{\rm VRR_{cum}} = \frac{B_w \, Q_{WI}}{B_w \, Q_W + B_o \, Q_O + B_g Q_G - B_g R_s Q_O}

LaTeX Math Block

anchor	1
alignment	left

{\rm VRR_{inst}} = \frac{B_w \, q_{WI}}{B_w \, q_W + B_o \, q_O + B_g (q_G - R_s Q_O)}

2

Recovery Map

Background = STOIIP & Structure

Bubbles = Q_o, Q_g , Q_w, Q_inj

,

Number = VRR, P_e

over RF & Structure

Recovery Distribution Overview

LaTeX Math Block

anchor	1
alignment	left

{\rm RF} = \frac{Q_o}{V_{STOIIP}}

3

Production History Graphs

Left Axis = q_o, q_g , q_w, q_inj,

Rigth Axis = Y_w, Y_g, P_e , N_p, N_inj

vs time

Hor Axis = Elapsed Time

Production History Overview

LaTeX Math Block

anchor	1
alignment	left

{\rm Y_w} = \frac{q_w}{q_{lis}}

LaTeX Math Block

anchor	1
alignment	left

{\rm Y_g} = \frac{q_g}{q_o}

LaTeX Math Block

anchor	1
alignment	left

q_{liq} = q_o + q_w

4

Decline Curve Analysis

Left Axis = q_o1, q_liq₁, q_inj1,

Rigth Axis = Y_w, Y_g, VRR, P_e vs time

Hor Axis = Elapsed Time

Production Forecast

5

Recovery Diagnostic

Left Axis = q_o1, q_liq₁, q_inj1

Rigth Axis =, Y_w, Y_g, VRR, P_e, P_em

Hor Axis = vs RF

Estimate recovery efficiency and pressure decline

6

Watercut Diagnostic

Left Axis = Y_w, Y_wm vs

Hor Axis = q_liq

Check for water balance and thief water production

LaTeX Math Block

anchor	1
alignment	left

{\rm Y_w} = \frac{1}{1 + \frac{K_{ro}}{K_{rw}} \cdot \frac{\mu_w}{\mu_o} \cdot \frac{B_w}{B_o}}

7

GOR Diagnostic

Left Axis = Y_g, Y_gm

Hor Axis = vs q_o

Check for gas balance and thief gas production

8

Injection Efficiency Diagnostics

Left Axis = PIR , PIR_m

vs

Hor Axis = Y_w

Evaluate WI efficiency

LaTeX Math Block

anchor	1
alignment	left

{\rm PIR} = \frac{Q_o}{Q_i}

LaTeX Math Block

anchor	1
alignment	left

{\rm PIR_m} = { \frac{1}{VRR} }*{ \frac{1-Y_w}{ Y_w + (1-Y_w) [ \frac{B_o}{B_w} - \frac{B_g}{B_w}(Y_g - R_s) ] } }

9

Well Performance Analysis

Left Axis = P_{wf_IPR} , P_{wf_VLP}vs

Hor Axis = q_o

Check for the optimal production/injection target

LaTeX Math Block

anchor	1
alignment	left

P_{wf} = P_e - \frac{1}{J_{PI}} q_o

10

Productivity Index Diagnostic

Left Axis = J_PI, J_PIm

vs dP

Hor Axis = dP = P_wf - P_e

Check for PI dynamics

LaTeX Math Block

anchor	F0UO41
alignment	left

{\rm J_{PI}} = \frac{Q}{P_e - P_{wf}} {\quad \Rightarrow \quad} P_{wf}=P_e - \frac{1}{PI}Q

LaTeX Math Block

anchor	1
alignment	left

{\rm J_{PIm} } = \frac{q_o}{P_e - P_{wf}}

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